The tea tin has a separate lid that I put a pin hole in. The mini Altoid tin has a hinge and I did not make a hole.
In the altoid's tin I rolled up a 2" x 10" piece of denim and closed the lid.
The tea tin I simply dropped six 2x4 swatches into the tin loosely.
Both came out fine. In fact the rolled altoid version leaves you with a nice roll of char in a nice sized tin. This will probably be my field tin for the char as well. That way I can both carry the char and make more in the tin when it is gone. Don't throw out them old jeans.
Now to get some flint and steel and Pyrite and try it like the Mountain Men of old.